. >> they just don't need to know the science. they have to be able to use it. >> they give us, like, small challenges to help us learn new things every day. >> reporter: raising the bar for students in the classroom to promote success. >> that was rehema ellis reporting. today's topics include what it takes more than high school and a healthy living to succeed in school. check out the summit online at educationnation.com. >>> do you throw out food as soon as the sell-by date or use-by date passes? if so, you may be wasting food and your money as well. a new study from the natural resources defense council claims those dates have nothing to do with when food goes bad. nbc's jeff rossen discussed the study's results this morning on the "today" show. >> when you buy eggs and you'll see that sell-by or use-by date on it, it usually goes for a couple weeks after that. eggs are goold three to five weeks after you buy it. >> cereal, cracker, things like that, how long after the date can i use these? >> nine months to a year they will st